+GEO*Trailblazer 1 Posted December 15, 2002 Share Posted December 15, 2002 Ok we heard about the CORS how about the High Accuracy Reference network. http://www.ngs.noaa.gov/PUBS_LIB/HARN_CORS_COMP/eval_harn_to_cors.html When all else fails Geotry again. Quote Link to comment
Z15 Posted December 16, 2002 Share Posted December 16, 2002 The differnce between the HARN and CORS is that you have to physically occupy the HARN stations whereas the CORS are permanently occupied and you just need to download the data to match your survey. Since the CORS are running 24/7, it can be determined how stable the positions are, whereas the HARN's are existing (for most part) horizontal and vertical control marks that are subject to movement from frost, construction activities and vandalish. Depending on the amount of CORS in your area, it can be much quicker to use CORS data. I know we used HARN for a while but when our CORS went online, we saved a lot of time by using the CORS data in our highway improvment Surveys. In 2001 we reobserved our HARN when we positioned our CORS stations. Quote Link to comment
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